Original Grate Heater 40K BTU Grate Heater for Masonry Fireplaces

The manufacturer does not describe normal operating noise levels for this unit, so we cannot confirm from the description alone whether the noise is a defect. However, the Grate Heater installation and operating instructions provide the following steps for a humming motor: 1. Unplug the unit. Remove the outside motor box panel (the right side panel on a right side motor unit, or the left side panel on a left side motor unit). Using a small probe, such as a screwdriver, through the openings in the fan housing, check that the fan spins freely. Take care not to bend the fins. Reattach the panel before plugging the unit back in. 2. Plug the unit into a grounded three-prong outlet, or use a grounded extension cord of the same or heavier rating as the supplied cord. A lighter cord can cause the fan to fluctuate in speed and operate improperly. The blower is thermostatically controlled. It normally turns on 15 to 30 minutes after the fire is started, at 110°F, and turns off at 90°F. If the noise continues after these checks, you can file a warranty claim through our warranty claim form. You can also reply with your order number, photos of the unit, and a description of the noise and when it occurs, and we can file the claim on your behalf.

"Right side" or "left side" refers to the location of the blower motor on the grate heater. Select your preferred option under the Choose Motor Location menu. Both Right Side and Left Side are available in the 22-inch and 24-inch widths. Model numbers identify each version: left side models have an LH suffix (GH-2220LH for 22 inch, GH-2422LH for 24 inch), while right side models have no suffix (GH-2220 for 22 inch, GH-2422 for 24 inch).